EP0666147A1 - Outil et raccordement d'outil pour des outillages à main - Google Patents

Outil et raccordement d'outil pour des outillages à main Download PDF

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Publication number
EP0666147A1
EP0666147A1 EP94810732A EP94810732A EP0666147A1 EP 0666147 A1 EP0666147 A1 EP 0666147A1 EP 94810732 A EP94810732 A EP 94810732A EP 94810732 A EP94810732 A EP 94810732A EP 0666147 A1 EP0666147 A1 EP 0666147A1
Authority
EP
European Patent Office
Prior art keywords
tool
longitudinal groove
groove
section
projection surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94810732A
Other languages
German (de)
English (en)
Other versions
EP0666147B1 (fr
Inventor
Josef Obermeier
Axel Neukirchen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hilti AG
Original Assignee
Hilti AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Publication of EP0666147A1 publication Critical patent/EP0666147A1/fr
Application granted granted Critical
Publication of EP0666147B1 publication Critical patent/EP0666147B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
    • B25D17/084—Rotating chucks or sockets
    • B25D17/088—Rotating chucks or sockets with radial movable locking elements co-operating with bit shafts specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/003—Details relating to chucks with radially movable locking elements
    • B25D2217/0034—Details of shank profiles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17042—Lost motion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/907—Tool or Tool with support including detailed shank
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/94—Tool-support
    • Y10T408/95—Tool-support with tool-retaining means
    • Y10T408/953—Clamping jaws

Definitions

  • the invention relates to a tool for insertion into a tool holder for chiselling and / or impact drilling hand tool devices with a clamping shaft with at least one axially closed locking groove, at least one of the locking groove substantially diametrically opposite longitudinal groove open towards the free end of the clamping shaft and two essentially mutually diametrically opposite rotary driving grooves open towards the free end of the clamping shank, which have different cross-sections with differently sized, radially outward opening surfaces.
  • the tools mentioned are used in hand tool devices, the tool holders of which have two carrier bars and one or two radially displaceable locking elements.
  • the drive bars are provided for connection to the rotary drive grooves and serve to transmit the torque.
  • the radially displaceable locking elements which can be designed as balls or rollers, come into contact with the axially closed locking grooves and thus serve to axially fix the tools in the tool holder.
  • the axial fixing of the tools in the tool holder is not particularly demanding, in addition to the use of two locking elements, the use of only one locking element is extremely common.
  • This axial fixing essentially involves ensuring that the tool does not unintentionally come loose from the tool holder, so that tools fall down on construction sites in particular no dangers arise.
  • the axial fixing serves to allow the tool and the hand tool to be removed from the component again after the machining process has ended.
  • a serious disadvantage of the aforementioned tool, which is provided with a longitudinal groove in the clamping shank, is that it cannot be used in hand tool devices, the tool holder of which has two locking elements, since the second locking element cannot enter the longitudinal groove. If, on the other hand, the tool is used in a tool holder with only one locking element, there is the possibility of insertion rotated by 180 ° with drive strips of the same cross-section. Due to the existing games or the resilient mounting of the locking elements, the means for radial displacement can still be actuated, so that the locking elements come into contact with the clamping shaft in a sometimes very strong frictional engagement.
  • the invention is therefore based on the object of providing a tool which is suitable for transmitting high torques in appropriately designed tool holders and which enables use in conventional tool holders, but which can sufficiently detect any incorrect locking there.
  • the object is achieved in that the axial projection surface of the clear cross section of the longitudinal groove corresponds at least to the axial projection surface of the clear cross section of the locking groove.
  • the tool with the clamping shank according to the invention can be inserted into conventional tool holders with two locking elements without problems. If this tool is correctly inserted into conventional tool holders with only one locking element, sufficient axial fixing is achieved. If, on the other hand, the tool is incorrectly inserted rotated by 180 ° in such a tool holder, the locking element will fully enter the clear cross section of the longitudinal groove without further hindrance, but will not come into contact with any circumferential parts of the clamping shaft. As a result, there is no connection of any kind between the clamping shank and the locking element, so that the operator can recognize that the tool has been incorrectly inserted into the tool holder due to the axial fixing not being achieved or at the latest when the control handle is used anyway. It is therefore completely out of the question for the operator to start machining components with the wrong tool.
  • the axial projection surface of the clear cross section of the longitudinal groove preferably corresponds to the axial projection surface of the clear cross section of the locking groove.
  • the longitudinal groove is advantageously trough-shaped.
  • Trough-shaped is understood to mean a longitudinal groove, the bottom of which, viewed in cross section, is adapted to the rotationally symmetrical locking bodies used.
  • the axial projection area of the clear cross section of the longitudinal groove can exceed the axial projection area of the clear cross section of the locking groove.
  • the longitudinal groove preferably has at least one essentially radially extending flank.
  • the flank of the longitudinal groove on the driving side runs essentially radially.
  • the other flanks can run in different ways, for example tendon-like or also radially.
  • the tool according to the invention is, on the one hand, that it can be used in the hand tool devices which are widely used on the market.
  • the further task is to design the tool in such a way that it is also suitable for the transmission of larger torques.
  • This latter task can be solved by a suitably designed tool holder, which has at least one radially displaceable locking element interacting with the axially closed locking groove, two driving bars interacting with the rotary driving grooves, which are provided with different cross sections due to different widths, and at least one interacting with the longitudinal groove Has longitudinal bar.
  • the tool shown in FIG. 1 has a clamping shank 1. Diametrically opposite one another, the clamping shank 1 has two rotary driving grooves 2, 3, the rotating driving groove 3 having a larger cross section with a larger, radially outward opening surface. In addition, an axially closed locking groove 4 is provided. This locking groove 4 is arranged diametrically opposite a trough-shaped longitudinal groove 5, which is open to the free end of the clamping shaft 1.
  • the tool according to FIG. 2 has a clamping shank 6 which is provided with two rotational driving grooves 7, 8 lying diametrically opposite one another.
  • the rotary driving groove 8 has a larger cross section with a larger radially outward opening area.
  • an axially closed locking groove 9 is provided, which diametrically opposite a longitudinal groove 10.
  • the axial projection surface of the clear cross-section of the longitudinal groove 10 exceeds the axial projection surface of the clear cross-section of the locking groove 9.
  • at least the flank 10a of the longitudinal groove 10 on the entrainment side is also essentially radially extending, whereby, for example in the present clamping shaft 6, it is symmetrical trained longitudinal groove 10 with radially extending flanks on both sides.
  • FIG. 3 shows a section through a tool holder shown in simplified form, into which a tool with a clamping shank 1 corresponding to FIG. 1 is inserted.
  • the tool holder essentially consists of a guide 11, an actuating sleeve 12 and a cage 13.
  • the guide 11 has two diametrically opposite one another Carrier strips 11a, 11b.
  • the driving bar 11b is provided with a larger cross section with a greater width than the driving bar 11a.
  • the guide 11 has a driving bar 11c which, in the present example, is of dome-shaped design seen in cross section.
  • a radially displaceable locking element 14 in the form of a ball is also provided for axially fixing the tool.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling Tools (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
EP94810732A 1994-02-03 1994-12-16 Outil et raccordement d'outil pour des outillages à main Expired - Lifetime EP0666147B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4403303 1994-02-03
DE4403303A DE4403303A1 (de) 1994-02-03 1994-02-03 Werkzeug und Werkzeugaufnahme für Handwerkzeuggeräte

Publications (2)

Publication Number Publication Date
EP0666147A1 true EP0666147A1 (fr) 1995-08-09
EP0666147B1 EP0666147B1 (fr) 1999-08-25

Family

ID=6509378

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94810732A Expired - Lifetime EP0666147B1 (fr) 1994-02-03 1994-12-16 Outil et raccordement d'outil pour des outillages à main

Country Status (8)

Country Link
US (1) US5529445A (fr)
EP (1) EP0666147B1 (fr)
JP (1) JPH07223174A (fr)
CN (1) CN1112865A (fr)
DE (2) DE4403303A1 (fr)
DK (1) DK0666147T3 (fr)
FI (1) FI950414A (fr)
HU (1) HU216379B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4338953A1 (de) * 1993-11-15 1995-05-18 Krupp Widia Gmbh Spannvorrichtung zur Verbindung eines Werkzeugkopfes und eines Werkzeughalters an Werkzeugmaschinen
US6089798A (en) * 1994-01-14 2000-07-18 Robert Bosch Gmbh Device for coupling a tool to a hand-held tool-driving device
DE20204416U1 (de) * 2002-03-19 2002-07-11 Heller Dinklage Gmbh Geb Werkzeug für eine Handwerkzeugmaschine
ATE460255T1 (de) * 2003-11-26 2010-03-15 Hilti Ag Werkzeugaufnahme für ein drehendes und schlagendes werkzeug

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2551125A1 (de) * 1975-11-14 1977-05-26 Bosch Gmbh Robert Einrichtung zur drehmomentuebertragung
DE3941646A1 (de) * 1989-12-16 1991-06-20 Heller Werkzeug Gmbh Geb Werkzeug zum schlagbohren und werkzeugaufnahme fuer schlagbohrende werkzeuge
EP0551795A1 (fr) * 1992-01-13 1993-07-21 HILTI Aktiengesellschaft Outil pour forage à percussion et ciselage et mandrin pour cet outil

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4137120A1 (de) * 1991-11-12 1993-05-13 Hilti Ag Werkzeug zum schlagbohren und werkzeugaufnahme fuer schlagbohrende werkzeuge
DE4210451A1 (de) * 1992-03-30 1993-10-07 Plica Werkzeugfabrik Ag Mollis Einrichtung zur Drehmomentübertragung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2551125A1 (de) * 1975-11-14 1977-05-26 Bosch Gmbh Robert Einrichtung zur drehmomentuebertragung
DE3941646A1 (de) * 1989-12-16 1991-06-20 Heller Werkzeug Gmbh Geb Werkzeug zum schlagbohren und werkzeugaufnahme fuer schlagbohrende werkzeuge
EP0551795A1 (fr) * 1992-01-13 1993-07-21 HILTI Aktiengesellschaft Outil pour forage à percussion et ciselage et mandrin pour cet outil

Also Published As

Publication number Publication date
FI950414A0 (fi) 1995-01-31
HU9500315D0 (en) 1995-03-28
JPH07223174A (ja) 1995-08-22
HUT69578A (en) 1995-09-28
EP0666147B1 (fr) 1999-08-25
DE59408658D1 (de) 1999-09-30
CN1112865A (zh) 1995-12-06
US5529445A (en) 1996-06-25
DK0666147T3 (da) 2000-02-07
HU216379B (hu) 1999-06-28
FI950414A (fi) 1995-08-04
DE4403303A1 (de) 1995-08-10

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